When the ray power is solved for, the Sound Pressure Level Calculation subnode is available from the context menu (right-click the Wall, parent node) or from the Physics toolbar, Attributes menu. The Sound Pressure Level Calculation subnode computes the sound pressure level resulting from the interaction of the incident and reflected acoustic waves at the wall.

Select the Compute smoothed accumulated variable check box to enter a Smoothing radius r (SI unit: m) The smoothing radius functions like the corresponding setting for the Accumulator (Boundary) node.